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weeeeeb [17]
3 years ago
11

Help me pls thank you

Biology
1 answer:
snow_tiger [21]3 years ago
4 0
What does the diagram represent here? I am having trouble understanding
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A student is setting up a model to study the carbon cycle and natural sources of carbon dioxide. They create a microenvironment
Alex Ar [27]

The natural source of carbon dioxide that was left out is the calcareous shells of organisms. The major metabolic process that was left out is respiration.

<h3>What is carbon dioxide?</h3>

Carbon dioxide is one of the gases that cycle around in the universe. It is an integral part of the carbon cycle. The carbon cycle is a model that depicts the movement of carbon in the ecosystem.

The natural source of carbon dioxide that was left out is the calcareous shells of organisms. The major metabolic process that was left out is respiration.

Learn more about carbon dioxide: brainly.com/question/3049557

8 0
2 years ago
During a knee flexion exercise, when you begin to fatigue what movement will you attempt to perform? Why?
nignag [31]

Knee flexion exercise is an exercise that involves bending the leg at the knee joint, thereby reducing the gap between the lower leg and upper leg.

The benefit of this exercise includes:

  • Helps to strengthens the muscles in the back of the thigh.
  • Helps to strengthens the muscles at the hamstrings.

The voluntary action that i may perform after experiencing fatigue from the exercise is to Stand Upright.

The action will helps my lower leg and upper leg to regain normal posture, thereby reducing the muscle tension around my knee.

Learn more about knee flexion exercise here

<em>brainly.com/question/22466488</em>

7 0
2 years ago
Compare actions of cocaine amphetamines and nicotine
Nookie1986 [14]
Nicotine on direct application in humans causes irritation and burning sensation in the mouth and throat, increased salivation, nausea, abdominal pain, vomiting and diarrhea. Predominant immediate effects consist of increase in pulse rate and blood pressure. Nicotine also causes an increase in plasma free fatty acids, hyperglycemia, and an increase in the level of catecholamines in the blood. There is reduced coronary blood flow but an increased skeletal muscle blood flow. The increased rate of respiration causes hypothermia, a hypercoagulable state, decreases skin temperature, and increases the blood viscosity.

For amphetamine the immediate effects are quicker reaction times, feelings of energy/wakefulness, excitement, increased attentiveness and concentration, feelings of euphoria. Side effects of amphetamines can include heart palpitations, dry mouth, headache, hostility, nausea, cognitive impairment, severe anxiety, lack of appetite, teeth grinding, dizziness, increased heart rate, heart palpitations, rapid breathing rate, hypertension (high blood pressure), increased body temperature, erectile dysfunction, irregular heartbeat.

Cocaine causes a short-lived, intense high that is immediately followed by the opposite intense depression, edginess and a craving for more of the drug the side effects are Loss of appetite increased heart rate, blood pressure, body temperature, contracted blood vessels increased rate of breathing, dilated pupils, disturbed sleep patterns, nausea, hyperstimulation, bizarre, erratic, sometimes violent behavior hallucinations, hyperexcitability, irritability, tactile hallucination that creates the illusion of bugs burrowing under the skin, intense euphoria, anxiety and paranoia, depression, intense drug craving, panic and psychosis, convulsions, seizures and sudden death from high doses (even one time)
8 0
3 years ago
What pigment absorbs light energy when photosynthesis begins?
gregori [183]
The answer is the pigment red
7 0
3 years ago
All BUT one description applies to the structure of RNA. That is A) four nitrogenous bases. B) double-stranded molecule. C) cont
irakobra [83]
double  stranded  molecule does  not  describe the  structure  of RNA. Most  RNA  are  single  stranded  with  partial  double  stranded  regions.  RNA  has  basic   component  as  the  DNA  that  is have  four  nitrogenous  base,  contain  phosphate  group  and  have  5  carbon sugar.
6 0
3 years ago
Read 2 more answers
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